There is replacement for displacement amongst us tuners, it called NOS or Turbo...LOL. Seriously though, when you compare v-8 to inline 4 your pitting a heavyweight against a lightweight. It's nothing to brag about believe me. There is different classes here. Domestic v-8's have the wrong idea when they sigh at an inline four that is tuned. They should be looking at cars in thier own class and sighing at that if needed. Cause I tell you what, when the Island Motorsport 4 door Integra spanked a Viper in the 1/4 mile that sets the tone for our market. There is horsepower to be made, having the brains to make it happen is the replacement for displacement.